抄録
Although there have been many reports on the precursor of vitamin B_6, the biosynthetic pathway of B_6 has not yet been clearly established. We studied incorporation of L-[U-^<14>C]alanine, [2-^<14>C]pyruvate, [2-^<14>C]acetate, [^<14>C] formate and [2-^<14>C]glycerol into pyridoxine in Flavobacterium sp. No. 238-7. The respective radioactive carbon of alanine, pyruvate, acetate, formate and glycerol was incorporated into pyridoxine with high dilution. These findings suggest that the compounds tested are not the direct precursor and the biosynthetic route in Flavobacterium sp. No. 238-7 is different from that in Escherichia coli.
